Looking at Spiral Company and the Tri Core rule. It says you can only ever have on model with the Tri Core special rule in your list, but that appears to be the only limitation. Does that mean it's legal for Spiral Company to have: a Tri Core, a 5 man Brawler core (4 brawlers and a schemer), a haris of longarms and any other triads that they can build with their leftover points?
Yeah, i'm not sure why you'd need to go to that extreme, I was just asking that to be thorough. The main question is really about an army having two teams with 5 man bonuses.